之前演示的switchver总是提示下面的错误,并且需要人工干预:

DGMGRL> switchover to snewtest;

Warning: You are no longer connected to ORACLE.

Please complete the following steps to finish switchover:

start up instance "newtest" of database "newtest"

解决方案

1.主库上配置 listener.ora

[oracle@localhost admin]$ vi listener.ora

# listener.ora Network Configuration File: /home/oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

# Generated by Oracle configuration tools.

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

)

)

)

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(GLOBAL_DBNAME = newtest)

(ORACLE_HOME = /home/oracle/app/oracle/product/11.2.0/dbhome_1/)

(SID_NAME = newtest)

)

(SID_DESC =

(GLOBAL_DBNAME = newtest_DGMGRL)

(ORACLE_HOME = /home/oracle/app/oracle/product/11.2.0/dbhome_1/)

(SID_NAME = newtest)

)

)

2.备库上配置 listener.ora

[oracle@localhost ~]$ cd /home/oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/

[oracle@localhost admin]$ vi listener.ora

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

)

)

)

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(GLOBAL_DBNAME = newtest)

(ORACLE_HOME = /home/oracle/app/oracle/product/11.2.0/dbhome_1/)

(SID_NAME = newtest)

)

(SID_DESC =

(GLOBAL_DBNAME = snewtest_DGMGRL)

(ORACLE_HOME = /home/oracle/app/oracle/product/11.2.0/dbhome_1/)

(SID_NAME = newtest)

)

)

3. 主备库重启lsrnctl

lsrnctl stop

lsrnctl start

任何库上执行切换

[oracle@localhost admin]$ dgmgrl sys/oracle@newtest

DGMGRL for Linux: Version 11.2.0.4.0 - 64bit Production

Copyright (c) 2000, 2009, Oracle. All rights reserved.

Welcome to DGMGRL, type "help" for information.

Connected.

切换到备库

DGMGRL> swithover to snewtest

Unrecognized command "swithover", try "help"

DGMGRL> switchover to snewtest;

Performing switchover NOW, please wait...

Operation requires a connection to instance "newtest" on database "snewtest"

Connecting to instance "newtest"...

Connected.

New primary database "snewtest" is opening...

Operation requires startup of instance "newtest" on database "newtest"

Starting instance "newtest"...

ORACLE instance started.

Database mounted.

Database opened.

Switchover succeeded, new primary is "snewtest"

切换回主库

DGMGRL> switchover to newtest;

Performing switchover NOW, please wait...

Operation requires a connection to instance "newtest" on database "newtest"

Connecting to instance "newtest"...

Connected.

New primary database "newtest" is opening...

Operation requires startup of instance "newtest" on database "snewtest"

Starting instance "newtest"...

ORACLE instance started.

Database mounted.

Database opened.

Switchover succeeded, new primary is "newtest"

这次的切换变得十分顺利 不需要人工干预了

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